Answer:
Below
Step-by-step explanation:
The equation is x2 + bx + c
The coefficients are
● a = 1
● b
● c is the constant
The difference of the roots is | b - 2c |
Let s and p be the roots of the polynomial
● s - p = | b - 2c | (1)
● s + p = -b/a => s + p = -b (2)
(1) + (2)
● s - p + s + p = |b-2c| - b
● 2s = | b - 2c | - b
● 2s = b - 2c - b or 2s = 2c - b - b
● 2s = - 2c or 2s = 2c - 2b
● s = - c or s = c - b
We want to express b in term of c. So we will be intetsted in the 2nd equation
● s = c - b
● s - c = - b
● b = c - s
A. 8.8 students per day on average were absent.
1) If the absence recorded was:
On Monday: 11
On Tuesday: 9
On Wed: 6
On Thu: 9
On Fri: 9
2) Since the number of weekdays were 5 we can calculate the mean of absent students by adding all those absences and dividing by 5
So, 11+9+6+9+9+9 =44
Dividing by 5
So the mean or the average of the absence was 8.8
Answer:
7.2*10⁶
Step-by-step explanation:
0.0000072 = 7.2*10⁶
Answer :
a + 1/4b
6/a + b/4
ab- 17
b/2 + 4
b + 1/a
5a - 6
Step-by-step explanation:
5a - 6 = 9
b/2 + 4 = 8
ab - 17 = 7
6/a + b/4 = 4
b + 1/a = 8.5
a + 1/4b = 3.03125
16 Hours because we can calculate the compensation per hour by doing 37,5/2,5=15 and then doing 240/15=16 to find how many hours does it take to get 240$
